var init = function() {
	var xiangmustyle = document.getElementById("xiangmu");
	alert(xiangmustyle);
	xiangmustyle.style.display = "";
};
var getPageSize = function() {
	var de = document.documentElement;
	var w = window.innerWidth || self.innerWidth || (de && de.clientWidth)
			|| document.body.clientWidth;
	var h = window.innerHeight || self.innerHeight || (de && de.clientHeight)
			|| document.body.clientHeight;
	arrayPageSize = new Array(w, h);
	return arrayPageSize;
};
var getPageScroll = function() {
	var yScrolltop = null;
	var xScrollleft = null;
	if (self.pageYOffset || self.pageXOffset) {
		yScrolltop = self.pageYOffset;
		xScrollleft = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop
			|| document.documentElement.scrollLeft) { // Explorer 6 Strict
		yScrolltop = document.documentElement.scrollTop;
		xScrollleft = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
		yScrolltop = document.body.scrollTop;
		xScrollleft = document.body.scrollLeft;
	}
	arrayPageScroll = new Array(xScrollleft, yScrolltop);
	return arrayPageScroll;
};